I've been using a 2.2kw spindle for several years now and it has served me well. I'm getting two new machines and need to get a spindle or 2. I'm thinking about moving up to a 4.5kw spindle or a 7.5kw spindle. My shop is located in an industrial zone and I have good 220 power. I'm going to be machining a lot of bronze and aluminum.

For a VFD I was looking at the Huanyang GT. Just not finding that much info on it. It's also important to me that I can set the VFD to display RPM. The few video's I've seen used 300 hz etc. I tried that for a minute on my 2.2kw spindle and hated it.

I'm leaning towards a 4.5kw chineese spindle for price and since it's water cooled. All the 7.5kw I'm finding at good prices tend to be fan cooled and I'm worried how they will hold up with my all day run times.

If anyone can share some spindle/vfd recommendations I would appreciate it.